How to select NC milling cutter
The selection of cutting tools is carried out under the condition of human-computer interaction. According to the processing ability of the machine, the material properties of the workpiece, processing procedures, cutting parameters and other factors related to the correct selection of tools and tools. The general principle of tool selection is: easy installation, good rigidity, high durability and high precision. Under the premise of meeting the requirements of processing, try to choose a shorter tool handle, so as to improve the rigidity of the tool.
In the process of the economical NC machine tool, the cutting, measuring and replacing of the tools are mostly manual and manual, and the auxiliary time is longer. General should follow the following principles: minimize the number of cutting tools; a tool clamping, should complete all processing steps which can be carried out; the machining tool should be used separately, even the same size of the tool; the first after milling drilling;; the first surface finishing after. For 2D contour machining; and where possible, should the ATC function as far as possible the use of CNC machine tools, in order to improve the production efficiency.
In the free surface (die) processing, because the end of the cutting speed of ball end cutters is zero, so as to ensure the machining accuracy, cutting the apex densely spaced generally distance, therefore ball commonly used in curved surface machining. The flat tool has better surface quality and cutting efficiency of ball cutter, therefore, as long as the guarantee but cut under the premise of both surface rough machining precision machining, should be preferred flat knife. In addition, the tool life and the relationship between the price of great accuracy and tool, must pay attention to is, in most cases, choose a good tool while increasing the tool cost, but the processing quality and efficiency of the improved, can make the whole process cost is reduced greatly.
When the tool is selected, the size of the tool is adapted to the size of the workpiece being machined. In the production of plane components peripheral outline processing, often uses the cutter; milling plane, elected hard alloy cutter; processing the boss and the groove, selection of high speed steel cutter; workpiece surface or rough machining holes, take optional maize milling with carbide tips; some of the three-dimensional surface and processing variable angle outline, often uses a ball milling cutter, milling cutter, milling cutter and circular cone disc cutter.
